Superconducting properties of the Fe-based layered superconductor LaFeAsO0.9F0.1-delta |
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| Authors: | Chen G F Li Z Li G Zhou J Wu D Dong J Hu W Z Zheng P Chen Z J Yuan H Q Singleton J Luo J L Wang N L |
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| Institution: | Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China. |
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| Abstract: | We have employed a new route to synthesize single phase F-doped LaOFeAs compound and confirmed the superconductivity above 20 K in this Fe-based system. We show that the new superconductor has a rather high upper critical field of over 50 T. A clear signature of superconducting gap opening below T(c) was observed in the far-infrared reflectance spectra, with 2Delta/kT(c) approximately 3.5-4.2. Furthermore, we show that the new superconductor has electron-type conducting carriers with a rather low-carrier density. |
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